The Porsche 917 is a racecar that gave Porsche its first overall wins at the 24 Hours of Le Mans in 1970 and 1971. Powered by the Type 912 flat-12 engine of 4.5, 4.9, or 5 litres, the long-tailed version was capable of a 0-62 mph (100 km/h) time of less than 2.5 seconds and a top speed of over 248 mph (394 km/h). Click here to read more.. »